Oatmeal-Chocolate Chip Cookies

INGREDIENTS

• 16 Tbs. (2 sticks) unsalted butter
• 3/4 cup granulated sugar
• 3/4 cup firmly packed light brown sugar
• 2 eggs
• 1 tsp. vanilla extract
• 1 1/2 cups all-purpose flour
• 1 tsp. baking soda
• 1/4 tsp. salt
• 2 cups old-fashioned rolled oats
• 12 oz. semisweet or bittersweet chocolate chips
• 1 cup walnuts, toasted and chopped (optional)